Injector



(Model.)

W. E. DODGE.

INJBGTOR. Q No. 383,109. Patented May 22, 1888.

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VALTER E. DODGE, OF EVERE'IT, ASSIGNOR TO THE NATIONAL TUBE VORKS COMPANY, OF BOSTON, MASSACHUSETTS.

lN-JECTOR.

r SPECIFICATION forming part of Letters Patent No. 383,109, dated May 22. 1888 Application tiled October 19, 1887. Serial No. 252,806. (Model.)

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Be it known that I, VALTER E. DODGE, of Everett, in the county of Middlesex and State ot' Massachusetts, have invented certain new and useful Improvementsin Inj ectors,of which the following is a specification.

This invention has for its object to provide certain improvements in boiler-feeding injectors, whereby the combining and delivery cones can be conveniently applied and removed at the delivery end of the injector, and also whereby the part ofthe combining-cone which is subjected to the greatest wear may be renioved and replaced without necessitating the discarding of the uuworn portions of said cone.

To these ends the invention consists in the several improvements, which I will now proceed to describe and claim.

The accompanying drawing represents a longitudinal section of an injector having my improvements.

In the drawing, a represents the main casing of the injector, having the steam-cone b, the steam-inlet d, and the water-inlet e, all of the usual or any suitable construction, and forming no part of my invention.

My present improvements are mainly embodied in the combiningcone f and the delivery-cone g, which are arranged in the casing in the usual relation to the steam-cone.

In carrying out my invention I make the combining-cone in two sections, 2 3. The sectlon 2 constitutes the forward end, which receives the steam cone, and is externally threaded at Li to screw into an internal thread formed in the casing c. The section 3 constitutes the portion ofthe combining-cone against which thestcam from the steamconeimpinges, this portion being worn away more rapidly than any other part of the combining-cone, and therefore requiring frequent renewal. The section 3 is externally threaded at its rear end and screwedinto a threaded socket in the delivery-cone g, and its opposite end is pro vided with an annular rib, 5, which enters an annular groove in the corresponding end of the section 2. Said rib and groove have a tapering` form in cross-section, so that the rib fits snugly in the groove and insures a setlieiently tight joint.

The delivery-cone g is externally threaded at its rear end and screwed into a coupling or connecting end, i, which connects thcinjectorcasing with the pipe j, through which the water passes from the injector to the boiler. The coupling has a iianged nut, k, engaged with thepipej,and also has an external screw-thread, whereby it is screwed into the end ofthe casing a at m. XVithin the coupling 'i is the usual valve, o, to prevent the return of water to the injector' from the pipe j. When the coupling i is unscrewcd and removed from the casing a, the delivery-cone g and the section 3 of the T combining-cone are removed with it, the opening at the end of the casing, into which the coupling i is screwed, being large enough 'to permit the passage of the section 3 through it.

It will be seen that as the section 3 of the combining-concis not positively secured to the section 2 it can readily be removed from the latter by removing the coupling t', and when so removed can be unscrewcd from the delivery-cone and replaced by a new section, so that the section 2, which is screwed into the casing a from the other end of the latter, is not necessarilyremoved or disturbed in renewing the section 3, and docs not have to be dis carded when the section 3 is replaced by a new one.

The deliveryvcone has a circular flange, 1*, which constitutes a partition extending across the space within the portion of the casing a in which the combining and delivery cones Iare located, and dividing said space into two chambers, 7 8, one of which, 8, receives the overflow through the usual overtlow-vents,s,cf the delivery cone, said overiiow escaping th rough an annular passage, t, communicating ata with the chamber 8 and at c with an escape pipe or nozzle. By thus dividing the annular space within the casing I confine the accumulation of overtlowwater within the casing to the minimum, so that when the injector is being started there will be the smallest possible quantity of water to re-eutcr the delivery-cone through the vents s s and retard the operation ofthe injector,it being a well-known fact that overflow or dead water in the casing of the injector, when free to reenter the delivery-cone, confuses (so to speak) the water which is being impelled through the injector and retards the operation at the commencement thereof.

IOO

I provide an orifice, w', in the casing a near the outer end of the steam-cone, said orifice heilig screw-threaded and adapted to receive the threaded shank of an oiler to supply oil, which is carried through the injector and lubricates all the working-surfaces. The orifice w has a cap, x,wherebyit may be closed When the oiler is not applied. There should be two orifices, w, one at each side of the injector, so that an oiler can be applied to either side according to the side of the engine that the injector is applied to.

I claiml. An injector having a combiningcone formed to receive the steaincone and madein separable sections not positively connected' ing no positive connection 'with the section 2,

and detachabl y connected to the delivery-cone,

and the coupling or connecting end to Which the delivery-cone is detaehably secured, said coupling being detachably secured to the c asing of the injector, said section 8 including the surface which. is subjected to the greatest Wear, as set forth. Y,

3. In an injector, the combination, With the casing having the overiioW-passage and the steam combining and delivery cones, of the fiange or partition i on the delivery-cone, whereby the space Within the casing containing the combining` and delivery cones is d1- vided and the overfioW-Water is confined to the space 8 surrounding the delivery-cone and excluded from the space 7 surrounding the combining-cone, substantially as and for the purpose specified.

4. The combination, with the steam conibining and delivery cones of an injector, of a casing having one or more capped orifices, w, communicating with the space containing the receiving end of the steam-cone, whereby oil may be introduced into said space to be carried bythe steam along the surfaces of said cones, as set forth.

In testimony whereofl have signed my name to this specification,in the presence of two subscribing witnesses, this 17th dayv of October, A. D. 1887.

WALTER' E. DODGE.

Vitnesscs:

C. F. BROWN, y A. D. HARRIsoN, 

